Planodraph co



J. N. PETERSON. BOBBIN WINDING MECHANISM.

APPLICATION FILED APR. 1. 1918.

Patented J 1113 1, 1919. 2 SHEETS-SHEET I THE COLUMBIA PLANonMpmcm,WASHINGTON. n. C.

L NLPETERSON.

BOBBIN WINDING MECHANISM.

APPLICATION FILED APR-1.1918.

Patented July 1, mm.

2 SHEETS SHEET 2.

A RE LANOORAPH c0 rne PATENT OFFICE.

.rornv 1v. rnrnnson, orivrILwAUKEn,wIsoonsInQAssmNon or ONE-HALF 'roCHARLES E. znnzre, or MILWAUK E, WISCONSIN.

BoBB In-wm nme MECHANISM.

Application filed April 1, 1918. Serial No. 225,967.

To all whom it may concern:

Be it known that I, J OHN N. Pn'rnnsonj a citizen of the UnitedStates,and resident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements inBobbin-"Winding Mechanism; and I do hereby declare that the following isa full, clear, and exact description thereof." a b My invention refersto improvements in sewing machines and other machines using bobbins orspoolsofthread, and more par ticularly to means for rewinding bobbins Iand spools or the like for use in such ma chines.

In devices of this general character at present in use a considerableamount of thread is wasted in addition to the fact that the mechanismsare slower in operation and otherwise less eflicient. One of the objectsof the present invention is, 1 therefore, to provide a bobbinwindingmechanism which will be semi-automatic, or automatic to theextent that the operation ceases when a pre determined amount of thread.has been wound upon the bobbin; and simultaneously with the cessation ofthe winding operation the thread will be severed. The provision of suchsimultaneous action saves approximately six inches of thread in eachwinding, and as many bobbins are .wound during the days work, it isobvious this saving amounts in a short time to uite a. considerableextent. i a

An additional obj ect is to provide an im proved and simply constructedmeans for holding the bobbin releasably, yet tightly,

in engagement with the main operating shaft. a Y

With these and other objects and advan tages in view the inventionresides in the novel features of construction, combination andarrangement of parts which will be hereinafter moreparticularlydescribed and claimed and shown in the drawings, whereinFigure 1 represents a side elevational view, partly in section ofabobbin winding mechanism constructed in accordance with my invention.

Fig. 2 is a vertical transverse sectional view taken substantially onthe plane of the line 22 of Fig. 1. I

Fig. 3 is a vertical sectibnal view on the plane of the line 3-3 of Fig.2.

Specification of Letters Patent.

Patented-July 1, 1919.

Fig. 4 is a horizontal sectional. view on the plane of theline H of Fig.1, and

Fig. 5 is an enlarged detail sectional view on the line5-5of Fig.1.

In practice my invention is adapted to be mounted adjacent the usualdrive belt B of a sewingmachine or machine of like nature. The operatingparts of the invention are all carried by a suitable support whichincludes a horizontally disposed base plate 1, and a vertical plate 2,one end of which is spaced from one end of thebase plate, said verticalplate having a laterally extending flange 3 beneath which the threadTwhich is to be woundis adapted to run. jT-he flange 3 thus preventsarticles from beingflaid across thesupport in such a manner as to be en?tangled with the thread. The up-right plate 2 has oppositely extendingattaching feet 4L whereby the support may be secured gagement by thedrive belt B. This shaft 7 is j ouinaled in a bearing 9 formed 011 theupper end of a swinging arm 10, the lower end of-which is bifurcated toprovide cars 11. Said ears are providedwith apertures which alinewithapertures formed infiXed spaced ears 12 which extend fromthe base plate1 asbest disclosed in Fig. 2; a pivot pin 13 lS GXtGDClG Cl through saidalined aper tures. By this arrangement "the pulley 8 may be swung towardor" away from the drive belt B, and when spaced therefrom is obviouslyinoperative. v

The pulley, 8 and its supporting swinging arm is heldin operativeposition by the engagement of a latch finger 14, carried by the end of apivoted flexible latch plate 15, with a catch 16 extending from thebearing 9. The latch plate 15 is pivoted to the upright plate 2 at itsend remote from the a 16 the bobbin 5 is frictionally held against iindependent rotative movement with respect to the shaft 7 by theengagement of the peripheral edge of one side flange 5 with the concaveface of a friction disk 18, said disk 5 being preferably formed ofleather and dis posed against the concave side of a cone-avoconvex plate19 which is secured to the shaft 7. Longitudinal movement of the bobbin,while the winding mechanism, including the ulley 8 and the swinging arm10, is moved from inactive to operative position is obviated by theengagement of a spherical spring pressed detent 20 in an annular groove21 formed in the inner Wall of the cylindrical body of said bobbin, saiddetent being positioned in a socket in the stub end (3 of said shaft 7.i i

Additional stationary retaining means is also provided for holding thebobbin for reta'tion with the shaft'7, said means being adapted tocooperate with the friction disk 18. This means includes a cylindricaldetent carrying casing' 22 adjustably secured to a bracket 23 carried bythe up-right plate 2 and disposed for longitudinalaxial' alinement withthe shaft 7 when the same is in operative position, said casingcontaining a spherical detent2a which is caused to extendthroughan'opening in one end by reason of an expansi'le spring 25. Theprojecting portion of the detent 2 1 is adapted to engage in the hollowbody of the bobbin 5 as shown in Fig. 5, the stub end of said shaft 6being of slightly less length than that of the body of the bobbin topermit this engagement between the latter and said detent 24. Ashereinbefore mentioned this invention includes means for automaticallyreleasing the winding mechanism from the drive belt B after apredetermined amount of'thread has been disposed on the bobbinTherefore, a releasing arm 26 is secured to the free end of the latchplate 15 and carries a roller 27 for engagement with the thread on thebobbin. An eXp'ansile spring 28 engaged with said latch plate normallyretains the roller 27 in contact with said thread and the latch finger14 in cooperation with the catch 16, and thus as the thread on thebobbin increases in amount, the releasing arm is raised upwardly againstthe tension of the spring, and finally the latch finger and its catchare disengaged. Upon said disengagement an eXpansile spring 29 willforce the swinging arm 10 to inactive position as indicated in Fig. 1.The tension of the drive belt B will aid the spring 29 in the returnmovement of the winding mechanism. Inasmuch as the winding mechanism isthrown to its inactive position with considerable force, a bumper 30 ofresilient material is secured to the base plate 1' in position to beengaged by the pulley 8.

Simultaneously with the movement of the winding mechanism to itsinoperative position, the thread T is severed at a point close to thebobbin 5. For this purpose the swinging arm 10 carries a reciprocatoryhooked cutting blade 31 which is moved across the path of movement ofthe thread by the rock ing of a bell crank lever 32, to one arm of whichit is connected by a pin Said cutting blade 31 is slidably guided in agroove 34; cut in the swinging arm 10 and in. which it is held by aplate 35, the latter being secured as at 36 to said arm 10; a slot 37 inthe plate 35 allows for the movement of the pin 33.

The bell crank lever is operated by a lever actuating plate 38 pivotedat one end as 39 to the base plate 1 and loosely attached at its otherend to the upper end of the swinging arm 10. It will be noted that thepivots of the arm 10 and the plate 38 are spaced apart. The plate 38 isprovided with a pair of spaced shoulders 40 and 4-0 between which thearm 41 of the bell crank lever 32 is disposed.

The thread T may be fed to the bobbin in any'desired manner, but ispreferably guided as shown most clearly in Figs. 1 and -t wherein 12 and4-3 represent a pair of spaced L-shaped guide rods secured to thenp-right plate 2 and having their free ends positioned in notches 44 cutin the flange 3. Said flange also has a guide opening 15 through whichthe thread is fed from a spool 16 or from any other suitable source.Between the guide rods 42 and 4L3is disposed a thread straightener 47 ofusual design. These elements are at the end of the support remote fromthe winding mechanism and the thread is guided at the other end,particularly adjacent the end of the up-right plate 2, between a pair ofspaced depending fingers -13 that extend from the free end of the latchplate 15. Said thread also runs over a wear plate 49 secured to thebracket 23 and is clamped against the sameby a retaining strip 50carried by the latch plate when the latter is disengaged from thewinding mechanism. This holds the thread taut after being severed sothat the same will be in position to be connected with a bobbin.

The operation can be readily seen from the several figures of thedrawings taken in connection with the accompanying deseription, but isbriefly set forth as follows Assuming that the parts are arranged as inFi 1 with the thread T disposed through the severalguiding devices, thefree end of said thread is positionedbetween the inner flange 5 of thebobbin and the friction disk 18 to connect the same with said bobbin.The winding mechanism is then swungtoward the right to engage the pulleyS with the belt B and connect the latch finger 14 with its catch 16.

When the winding member was in inactive position the reciprocatorycutting blade 31 [1,308,529 r a d 3 was in retracted position inasmuchasthe shoulder 40 was in engagementx with the arm 41 to hold the latterin lowered position. When, however, the winding mechanism is J movedinto operative position the other shouldertO engages and raises the arm41 and. therefore throws thecuttme' blade to its extended position as inFig.2.

the engagement of the shoulder 40 with the arm tl of the bellcrank leverand the thread T severed.

Various minor changesfimay be made in theform and proportion of theseveral parts a of the invention without departing from or sacrificingany ofthe principles thereofas set forth in. the following claims.

Iclaim:. 1 i

d 1. A bobbin winding mechanism including a support, a carriage movableon the support and resiliently urged to movement in one direction, alatch member urged for engagement with the carriage to hold it againstmovement, a bobbin shaft on the carriage, a drive member on the shaft,means for releasing the carriage from the latch member, and meansoperable by releaseof the carriage from the latch member for clampingthread adjacent the carriage.

2. A bobbin winding mechanism including a support, a carriage movable onthe support and resiliently urged to movement in one direction, a latchmember urged for engagement with the carriage to hold it againstmovement, a bobbin shaft on the carriage, a drive member on the shaft,means for releasing the carriage from the latch member, a frictionalthread holding means on the support remote from the carriage, and meansoperable by release of the carriage from the latch member for clampingthread adjacent the carriage.

3. A bobbin winding mechanism including a support, a carriage movable onthe support and resiliently urged to movement in one direction, alatchmember resiliently urged for engagement with the carriage to hold itagainst movement, a bobbin shaft 011 the carriage, a drive member on.the shaft, means for releasing the carriage from the latch member, aclamping portion on the latch member, and a clamping member carried bythe support and engageable by the clamping portion of the latch memberupon release of the carriage from the latch member for clamping threadbetween said clamping portion and clamping member.

4. A bobbin winding mechanism includ ing a support, a carriage movableon the support, a bobbin shaft on the carriage, a drive member on theshaft, means resiliently urging the carriage to movement in one direction, means for holding the carriage against such movement, meansoperable by the amount of thread wound on abobbin on the shaftforreleasing said holding means, meanstoperable ,COlIlCldBlll; to,release of the carriage for clamping thread thereadjacent, and meansoperable uponrelease of the carrlage for cutting thread between thebobbin and said clampmgmeans.

.5. 1A bobbinwinding mechanismuincluding a support, a carriagemovable onthe support and resiliently urged to movement in one direction, abobbinshaft on the carriage, drive member on the shaft, a knife mountedon the carriagerand movable relative to i the carriage to procurecutting action and meansoperable by movement of the. carriage for movingthe knife relative tothe carriage for cutting thread adjacent thebobbin.l e a M 6. bobbin winding mechanism including a support, a carriagemovable on the support and resiliently urged to movement in onedlrection, a bobbin shaft on the carriage,

a drive member on the shaft, a knife slidable on the carriage, a leveron the carriage engageab-le with said knife for moving the knife to cutthread adjacent the bobbin, and a member on the support and engageableby the lever upon movement of the carriage for moving said kniferelative to the carriage.

7. A bobbin winding mechanism including a support, a carriage movable onthe support and resiliently urged to movement in one direction, a bobbinshaft on the carriage, a drive member on the shaft, a knife transverselyslidable on the carriage, an angle lever having one arm connected withthe knife for sliding saidknife to cut thread adjacent the bobbin, and amember on the support and engageable with the other arm of a the anglelever forsliding the knife.

8. In a bobbin winding mechanism, a support, a carriage pivotallymounted on the support, a bobbin shaft on the carriage, a drive memberon the shaft, and a knife slidable on the carriage, an angle leverpivoted on the carriage and having one end connected with the knife forprocuring sliding move nt of the knife to cut thread adjacent the Iobbin, a bar pivoted on the sup-- port adjacent the carriage andslidably connected with the carriage, and stops on the bar engageablewith the other arm of the angle lever.

9. A bobbin winding mechanism including a support, a carriage mounted onthe support for movement toward and away from a certain drive position,a bobbin shaft on the carriage, a drive member on the bob bin shaft, anda detent member mounted on the support for opposition to one end of theshaft in drive position of thecarriage for holding a bobbin on theshaft'in such drive position of the carriage.

10. A bo bbin Winding mechanism including asu-pport, a carriage mountedon the support for movement toward and away from a certain driveposition, a bobbin shaft on the carriage, a drive memberon the bobbin.shaft,*a' bobbin stop on the shaft'adjacent one end thereof, and ayieldably mounted holding member mounted on the support for oppositionto theshaftend in drive position of the carriage for engagement in thebore of a bobbin on theshaft end in drive position of the carriage.

11. A bobbin winding mechanism including a support, a carriage mountedon the support for I movement toward and away from acertain driveposition, a bobbin shaft on the carriage, a drive member on the bobbinshaft; a vbobbin stop on the shaft adjacentone end thereof, a yieldablymounted holding member mounted on the support for oppositionto the shaftendin drive position Gopies mflthis patent' may be obtained for of thecarriage for engagement in the bore of a bobbin on the shaft end indrive position of the carriage, and a bobbin engaging friction face onthe stop member.

12. A bobbin winding mechanism including a support, a carriage mountedon the support for movement toward and away from a certain driveposition, a bobbin shaft on the carriage, a drive member on the bobbinshaft, a casing mounted on the support and provided with an openingdisposed for axial alinement with the bobbin shaft in drive position ofthe carriage, a ball in the casing adapted to partially project throughthe opening for yieldable engagement in the bore of a bobbin mounted onthe shaft, and aspring in the casing urging said ball to project throughthe opening.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee, in the county of Milwaukee, and State of Wisconsm.

JOHN N. PETERSON.

five cents each, by addressing the Commissioner of Patents. Washington,D. 0.

